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EVA (ethylene-vinyl acetate) precoating packaging adhesive film and preparation method thereof

An encapsulating film and pre-coating technology, applied in adhesives, film/sheet adhesives, adhesive additives, etc., to ensure mechanical strength and flexibility, simplify process complexity, and enhance impact resistance.

Inactive Publication Date: 2015-07-08
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The existing production method of EVA encapsulation film is to adopt the extrusion casting method, its production speed is relatively slow, the cost is high, and the performance of the product is not up to do Requirements for solar modules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) 100 parts of ethylene-vinyl acetate copolymer, 0.5 parts of crosslinking agent 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, antioxidant tris(2,4- 0.1 part of di-tert-butylphenyl) phosphite, light stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate and methyl-1,2, After mixing 0.02 parts of the compound of 2,6,6-pentamethyl-4-piperidinyl sebacate and 0.04 parts of the tackifier γ-aminopropyltriethoxysilane, the adding temperature is 200~ Melt, extrude, and make materials in a twin-screw extruder at 230°C to obtain EVA rubber layer raw materials;

[0039] 2) Unwind the BOPP film and perform corona treatment so that the surface tension of the BOPP film is greater than 40mN / m;

[0040] 3) Coat both sides of the treated BOPP film with water-based polyethyleneimine solution, and then dry;

[0041] 4) Add the EVA adhesive layer raw material prepared in step (1) into a single-screw extruder at a temperature of 210~230°C, and extrude and compound it into (3) and d...

Embodiment 2

[0044] 1) 100 parts of ethylene-vinyl acetate copolymer, 1 part of crosslinking agent 1,1-(diperoxy-tert-butyl) 3,3,5-trimethylcyclohexane, antioxidant tris( monononylbenzene and dinonylbenzene mixed ester) 2 parts, light stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate and methyl-1, After mixing 0.01 part of the compound of 2,2,6,6-pentamethyl-4-piperidinyl sebacate and 0.02 part of the tackifier γ-aminopropyltriethoxysilane, the addition temperature is Melt, extrude, and make materials in a twin-screw extruder at 200~230°C to obtain the raw material for the EVA adhesive layer;

[0045] 2) Unwind the BOPP film and perform corona treatment so that the surface tension of the BOPP film is greater than 40mN / m;

[0046] 3) Coat both sides of the treated BOPP film with water-based polyethyleneimine solution, and then dry;

[0047] 4) Add the EVA adhesive layer raw material prepared in step (1) into a single-screw extruder at a temperature of 210~230°C, and extrude and...

Embodiment 3

[0050] 1) 100 parts of ethylene-vinyl acetate copolymer, 0.8 parts of crosslinking agent 1,1-(diperoxy-tert-butyl) 3,3,5-trimethylcyclohexane, antioxidant tetrakis[β- 1 part of (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, light stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl)decane 0.01 part of the compound of dioic acid ester and methyl-1,2,2,6,6-pentamethyl-4-piperidinyl sebacate, tackifier γ-aminopropyltriethoxysilane After mixing 0.03 parts, add it to a twin-screw extruder at a temperature of 200~230°C to melt, extrude, and make materials to obtain the EVA rubber layer raw material;

[0051] 2) Unwind the BOPP film and perform corona treatment so that the surface tension of the BOPP film is greater than 40mN / m;

[0052] 3) Coat both sides of the treated BOPP film with water-based polyethyleneimine solution, and then dry;

[0053]4) Add the EVA adhesive layer raw material prepared in step (1) into a single-screw extruder at a temperature of 21...

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Abstract

The invention provides an EVA (ethylene-vinyl acetate) precoating packaging adhesive film and a preparation method thereof. The adhesive film is composed of three layers, wherein the middle layer is a BOPP (biaxially-oriented polypropylene) film layer, and the upper and lower layers are respectively an EVA adhesive layer. The EVA adhesive layer is prepared from 100 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of crosslinking agent, 0.1-2 parts of antioxidant, 0.01-0.02 part of light stabilizer and 0.02-0.04 part of tackifier. A precoating technique is adopted to produce the EVA packaging adhesive film, i.e. the EVA adhesive layers are coated to the upper and lower surfaces of the BOPP film layer to constitute the EVA packaging adhesive film, thereby greatly enhancing the production rate and simplifying the technique complexity degree under the support of the BOPP film. The bonding firmness between the EVA adhesive layer and BOPP film layer is enhanced, and the shock strength and environmental stress crack resistance of the adhesive film are enhanced.

Description

Technical field: [0001] The present invention involves the field of printing film technology, and specially involves an EVA pre -coated packaging film and its preparation method. technical background: [0002] With the rapid development of solar batteries, as an important part of solar cells, the output of EVA packaging glue film has continued to increase. Although its value is small, it is very high and extremely sensitive.Deadly defects.EVA packaging glue film requires good softness in a wide range of temperature, impact resistance, environmental stress cracking and good optical properties, and also has the characteristics of low temperature resistance and non -toxic.These performance indicators of EVA packaging glue film directly determine the long -term quality of solar cell components, especially its power attenuation performance. [0003] The production method of the existing EVA packaging glue film is to use extrusion flow. Its production speed is relatively slow, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J123/08C09J11/06
Inventor 汪中祥陈铸红李永荃
Owner ANHUI GUOFENG PLASTIC
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